An experimental device for groundwater pumping and recharging

Abstract

The present invention discloses an experimental device for groundwater pumping and recharging, which belongs to the technical field of groundwater recharging experiments. The experimental device for groundwater pumping and recharging includes several split experimental boxes, both ends of the split experimental boxes are fixedly connected with locking mechanisms, one side of the split experimental box is fixedly connected with a fixing mechanism, a sensor is fixedly connected in the fixing mechanism, one end of the sensor away from the fixing mechanism is fixedly connected with a data line, and a recharging pipe is arranged in the split experimental box. The present invention uses split experimental boxes and fills different sands in different split experimental boxes, so that targeted experiments on the influence of recharging water can be carried out on different geological conditions. The use of fixing mechanisms and locking mechanisms facilitates the installation of sensors and the fixing of split experimental boxes, and facilitates repeated experiments.

Description

Technical Field

[0001] The invention belongs to the technical field of groundwater recharge experiments, and in particular relates to a groundwater pumping and recharge experimental device. Background Art

[0002] The experimental device for groundwater pumping and recharging is mainly used to study the artificial recharge mechanism of groundwater and to evaluate the impact of groundwater pumping and recharging on groundwater resources and water quality. In coastal areas, the device can be used to study the relationship between seawater intrusion and groundwater recharging, that is, by simulating different recharging schemes, observe whether the intrusion of seawater into inland aquifers can be effectively prevented. In the field of groundwater pollution control, it can be used to test the feasibility of diluting and repairing contaminated groundwater by recharging clean water. At the beginning of the experiment, the groundwater in the aquifer simulation unit is extracted by the submersible pump of the pumping well simulation unit to simulate the actual groundwater extraction process. The extracted groundwater can be transported to a water storage container through a pipeline for subsequent recharging or water quality analysis.

[0003] During the recharge process, the pressure pump of the recharge well simulation unit is used to pressurize water from the water storage container or other water sources (such as treated recycled water) into the recharge well pipeline, so that it can be recharged into the aquifer simulation unit. During the process of pumping and recharging, the monitoring system unit monitors the changes in parameters such as water level, water quality and flow in real time, and the data acquisition and control system unit records and analyzes these data, so as to study the groundwater dynamic field and water quality changes during the process of groundwater pumping and recharging.

[0004] This device can be used to conduct research in a controlled laboratory environment, avoiding the complexity and unpredictability of actual groundwater systems. It can accurately control various parameters of pumping and recharging, such as flow, pressure, water quality, etc., making it easier to conduct comparative experiments. Moreover, the monitoring system can provide a detailed understanding of the various changes in groundwater during the pumping and recharging process, providing a scientific basis for groundwater management and protection.

[0005] However, when the existing groundwater pumping and recharging experimental device conducts geological simulation in the early stage, due to the different geological compositions in different places, the geology simulated by the experiment needs to be set up according to the local geology, so different sands need to be landfilled. At the same time, the recharging pipe of the existing experimental device is often located in the center of the device when it is set up. If you want to measure a place far away from the recharging pipe, you need to expand the floor space of the experimental device, and the position of the sensor cannot be adjusted, which makes it inconvenient to repeat the experiment. Summary of the invention

[0006] The technical problem to be solved by the present invention is to overcome the disadvantages of the above-mentioned prior art and provide an experimental device for groundwater pumping and recharging.

[0007] The technical solution adopted to solve the above technical problems is: an experimental device for groundwater pumping and recharging, comprising a plurality of split experimental boxes, both ends of the split experimental boxes are fixedly connected with locking mechanisms, one side of the split experimental box is fixedly connected with a fixing mechanism, a sensor is fixedly connected in the fixing mechanism, one end of the sensor away from the fixing mechanism is fixedly connected with a data line, a recharging pipe is arranged in the split experimental box, and the recharging pipe passes through a first through hole for sliding connection;

[0008] The split experiment box includes a bottom frame, a bottom plate is fixedly connected inside the bottom frame, a rotating plate is eccentrically rotatably connected inside the bottom plate, a first through hole is eccentrically opened on the rotating plate, a middle frame is rotatably connected to the upper surface of the bottom frame, and an end of the middle frame away from the bottom frame is rotatably connected to the upper frame.

[0009] Through the above technical scheme, different split experiment boxes can be used to fill different sands and soils in different split experiment boxes, and combined experiments can be carried out through multiple split experiment boxes, so that accurate experiments can be carried out for different geological conditions. At the same time, through the use of the bottom plate and the rotating plate, the recharge pipe can be adjusted to different positions in the split experiment box. The eccentric setting of the first through hole on the rotating plate can make the recharge pipe move away from one side of the sensor, increase the distance between the sensor and the recharge pipe, so as to collect more comprehensive data. The use of the split experiment box facilitates the filling of sand and soil, thereby facilitating repeated experiments.

[0010] Furthermore, the upper and lower ends of the middle frame are fixedly connected with a first limiting ring, the upper surface of the bottom frame and the lower surface of the upper frame are provided with a first limiting groove, the first limiting ring and the first limiting groove slide in cooperation with each other, the upper surface of the upper frame is fixedly connected with a sealing rubber strip, the outside of the rotating plate is fixedly connected with a second limiting ring, the inside of the bottom plate is provided with a second limiting groove, the second limiting ring and the second limiting groove slide in cooperation with each other, and the bottom plate and the rotating plate are provided with water leakage holes.

[0011] Through the above technical solution, the middle frame, the upper frame and the bottom frame can be prevented from being separated, and the bottom plate and the rotating plate can be prevented from being separated, making the whole more solid.

[0012] Furthermore, the locking mechanism includes a second fixing frame fixedly connected to both sides of the bottom frame, a first fixing frame fixedly connected to both sides of the upper frame, a sliding rod fixedly connected to the upper surface of the first fixing frame, a locking pin slidably connected through the outside of the sliding rod, a tension spring is provided outside the sliding rod, the upper end of the tension spring is fixedly connected to the locking pin, and a first groove is provided outside the locking pin.

[0013] Through the above technical scheme, the split experiment boxes can be fixed by simply stacking them layer by layer and inserting the locking pin into the outer shell through the use of the locking mechanism. At the same time, through the use of tension springs, the connection between the split experiment boxes can be made tighter, and the use of sealing rubber strips can prevent the backflow water from leaking from between the split experiment boxes.

[0014] Furthermore, the second fixed frame is fixedly connected to a shell, the outside of the shell is fixedly connected to a first handle, the upper end of the shell is penetrated by a button slidably connected, the button is provided with a third limiting groove, the upper top wall of the button is fixedly connected to a first spring, the lower end of the first spring is fixedly connected to a moving column, the upper end of the moving column is fixedly connected to a fixing ring, and the fixing ring and the third limiting groove are slidably matched with each other.

[0015] Through the above technical solution, the outer shell is aligned with the locking pin and inserted. At this time, the locking pin lifts up the second steel ball. At this time, the second steel ball is blocked by the outer shell and cannot move outward, thereby pushing the movable column to move upward. When the second steel ball moves up to the position where it is separated from the inclined surface, the second steel ball is not blocked by the outer shell and moves outward, so that the locking pin is inserted into the lower end of the movable column. Due to the lack of the push of the second steel ball, the movable column moves downward under the push of the second spring, so that the second steel ball is pushed inward by the inclined surface and enters the first groove when moving downward, locking the locking pin and squeezing it upward. At this time, the locking pin is pulled by the tension spring to make the connection between the two split experimental boxes tighter.

[0016] Furthermore, a first baffle is fixedly connected inside the shell, a plurality of first steel balls are arranged on the upper surface of the first baffle, an oblique groove is provided on the lower surface of the button, a second groove is provided on the position of the movable column close to the first baffle, a second spring is fixedly connected to the lower surface of the first baffle, the lower end of the second spring is fixedly connected to the movable column, a plurality of second through holes are provided at the lower end of the movable column, and second steel balls are provided in each of the plurality of second through holes.

[0017] Through the above technical solution, the button can be pressed downward, the button moves downward and pushes the first steel ball inward through the inclined groove, and the first steel ball drives the movable column to move upward by squeezing the second groove, so that the second steel ball is driven to move upward, and the second steel ball is released from the state of being fixed by the inclined surface, so that the second steel ball is withdrawn from the first groove and the lock is released, and then the split experiment box is driven upward by the first handle to separate the split experiment box.

[0018] Furthermore, the fixing mechanism includes a fixing interface fixedly connected to one side of the middle frame, the fixing interface is fixedly connected to a thin tube at one end away from the middle frame, a pair of L-shaped grooves are provided on the thin tube, and the fixing interface is fixedly connected to a third spring at one end close to the thin tube.

[0019] Through the above technical solution, the sensor can be fixed by using a fixing mechanism, simply by inserting the sensor into the fixing interface and rotating it, which greatly facilitates the fixed setting of the sensor. At the same time, the sensor is set in a rotatable middle frame, and the position between the sensor and the reinjection pipe can be adjusted to improve data collection efficiency.

[0020] Furthermore, one end of the third spring away from the fixed interface is fixedly connected with a fixed sleeve, one end of the fixed sleeve away from the fixed interface is provided with a pair of straight sliding grooves, and a sensor is slidably connected through the fixed interface.

[0021] Through the above technical solution, the second handle drives the limit column on the probe to align with the L-shaped slide groove on the capillary, so that the probe is inserted into the fixed interface. At this time, the limit column pushes the fixed sleeve to move. When the limit column reaches the bottom end of the L-shaped slide groove, the second handle is rotated. When the limit column rotates to the straight slide groove, the third spring pushes the fixed sleeve to move, and the limit column is locked through the L-shaped slide groove and the straight slide groove, thereby fixing the sensor on the middle frame.

[0022] Furthermore, the sensor includes a probe slidably connected in the fixed interface, the end of the probe away from the fixed interface is fixedly connected to the second baffle, the end of the second baffle away from the probe is fixedly connected to the second handle, the end of the second handle away from the second baffle is fixedly connected to the data line, and the end of the probe close to the second baffle is fixedly connected to a pair of limit columns, the limit columns and the straight slide grooves are slidably matched with each other, the limit columns pass through the slidingly connected L-shaped slide groove, and the fixed sleeve and the second handle are provided with anti-slip patterns on the outside.

[0023] Through the above technical solution, the sensor can be easily inserted into the split experiment box, thereby greatly facilitating data collection.

[0024] The beneficial effects of the present invention are as follows: (1) The present invention uses a split test box to fill different sands and soils in different split test boxes, and conducts combined experiments through multiple split test boxes, so that accurate experiments can be conducted for different geological conditions. At the same time, the use of the bottom plate and the rotating plate can adjust the different positions of the recharging pipe in the split test box. The eccentric setting of the first through hole on the rotating plate can make the recharging pipe away from the sensor on one side, increase the distance between the sensor and the recharging pipe, so as to collect more comprehensive data, and the use of the split test box is convenient for the landfill of sand and soil, so as to facilitate repeated experiments; (2) The present invention uses a fixing mechanism to fix the sensor by simply inserting the sensor into the fixing interface and rotating it, which greatly facilitates the fixing and setting of the sensor. At the same time, the sensor can adjust the position between the sensor and the recharging pipe by cooperating with the rotatable middle frame, thereby improving the data collection efficiency; (3) The present invention uses a locking mechanism to fix the split test boxes by simply stacking them layer by layer and inserting the locking pin into the outer shell. At the same time, the use of the tension spring can make the connection between the split test boxes tighter, and the use of the sealing rubber strip can prevent the recharging water from leaking from the split test boxes. BRIEF DESCRIPTION OF THE DRAWINGS

[0025] Figure 1 It is the overall structure diagram of the present invention;

[0026] Figure 2 It is a structural diagram of the split experiment box of the present invention;

[0027] Figure 3 yes Figure 2 A magnified image of point A;

[0028] Figure 4 It is an exploded structural diagram of the split experiment box of the present invention;

[0029] Figure 5 It is the exploded structural diagram of the bottom plate of the present invention;

[0030] Figure 6 is a cross-sectional view of the split experiment box of the present invention from a first viewing angle;

[0031] Figure 7 is a cross-sectional view of the split experimental box of the present invention from a second viewing angle;

[0032] Figure 8 yes Figure 7 A magnified view of point B;

[0033] Fig. 9 yes Figure 7 Enlarged view of point C;

[0034] Fig.10 It is an exploded structural diagram of the sensor fixing mechanism of the present invention;

[0035] Fig.11 is a three-dimensional diagram of the fixing sleeve of the present invention;

[0036] Fig.12 It is a cross-sectional view of the locking mechanism of the present invention.

[0037] Figure numerals: 1, split experimental box; 11, bottom frame; 12, bottom plate; 13, rotating plate; 14, first through hole; 15, middle frame; 16, upper frame; 17, sealing rubber strip; 18, first limiting ring; 19, first limiting groove; 110, second limiting ring; 111, second limiting groove; 2, locking mechanism; 21, first fixing frame; 22, sliding rod; 23, tension spring; 24, locking pin; 25, first groove; 26, second fixing frame; 27, housing; 28, first handle; 29, button; 210, first spring ; 211, third limiting groove; 212, inclined groove; 213, movable column; 214, fixed ring; 215, first baffle; 216, first steel ball; 217, second spring; 218, second groove; 219, second through hole; 220, second steel ball; 3, fixing mechanism; 31, fixing interface; 32, capillary; 33, third spring; 34, fixing sleeve; 35, L-shaped slide groove; 36, straight slide groove; 4, sensor; 41, probe; 42, second baffle; 43, second handle; 44, limiting column; 5, data cable. DETAILED DESCRIPTION

[0038] In order to make the purpose, technical solution and advantages of the present invention more clearly understood, the present invention is further described in detail below in conjunction with the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are only used to explain the present invention and are not intended to limit the present invention.

[0039] like Figure 1-Figure 12 As shown, an experimental device for groundwater pumping and recharging in this embodiment includes a plurality of split experimental boxes 1, one end of a sensor 4 away from a fixing mechanism 3 is fixedly connected to a data line 5, and a recharging pipe is arranged in the split experimental box 1.

[0040] like Figure 2 , Figure 4-Figure 8 As shown, the split experiment box 1 includes a bottom frame 11, a bottom plate 12 is fixedly connected in the bottom frame 11, a rotating plate 13 is eccentrically rotatably connected in the bottom plate 12, a first through hole 14 is eccentrically opened on the rotating plate 13, a middle frame 15 is rotatably connected to the upper surface of the bottom frame 11, and an end of the middle frame 15 away from the bottom frame 11 is rotatably connected to the upper frame 16, a recharging pipe passes through and slides to connect the first through hole 14, the rotating plate 13 is rotated so that the first through holes 14 are all located in a fixed position, and then the recharging pipe is inserted into the first through hole 14, and sand is filled in the split experiment box 1, and multiple split experiment boxes 1 are put on the recharging pipe one by one, and different sand is added to the split experiment box 1 each time a split experiment box 1 is put on.

[0041] The upper and lower ends of the middle frame 15 are fixedly connected with a first limiting ring 18, the upper surface of the bottom frame 11 and the lower surface of the upper frame 16 are provided with a first limiting groove 19, the first limiting ring 18 and the first limiting groove 19 slide in cooperation with each other, the upper surface of the upper frame 16 is fixedly connected with a sealing rubber strip 17, the outside of the rotating plate 13 is fixedly connected with a second limiting ring 110, the bottom plate 12 is provided with a second limiting groove 111, the second limiting ring 110 and the second limiting groove 111 slide in cooperation with each other, and the bottom plate 12 and the rotating plate 13 are provided with water leakage holes, and the first limiting ring 18 and the first limiting groove 19, the second limiting ring 110 and the second limiting groove 111 are provided to prevent the upper frame 16, the middle frame 15 and the bottom frame 11 from disengaging, and at the same time prevent the bottom plate 12 and the rotating plate 13 from disengaging.

[0042] like Figure 3 , Figure 4 and Fig.12 As shown, both ends of the split experiment box 1 are fixedly connected with a locking mechanism 2, and the locking mechanism 2 includes a second fixing frame 26 fixedly connected to both sides of the bottom frame 11, and the first fixing frames 21 are fixedly connected to both sides of the upper frame 16. The upper surface of the first fixing frame 21 is fixedly connected with a sliding rod 22, and a locking pin 24 is slidably connected to the outside of the sliding rod 22. A tension spring 23 is provided on the outer sleeve of the sliding rod 22, and the upper end of the tension spring 23 is fixedly connected to the locking pin 24. A first groove 25 is provided on the outside of the locking pin 24, and the first groove 25 and the second steel ball 220 are engaged with each other. The locking pin 24 is pulled by the tension spring 23 to make the connection between the two split experiment boxes 1 tighter, and internal water leakage is prevented by squeezing the sealing rubber strip 17.

[0043] The second fixing frame 26 is fixedly connected to a housing 27, and the outer side of the housing 27 is fixedly connected to a first handle 28, and the upper end of the housing 27 is slidably connected to a button 29, and a third limiting groove 211 is provided in the button 29, and a first spring 210 is fixedly connected to the upper top wall of the button 29, and a moving column 213 is fixedly connected to the lower end of the first spring 210, and a fixing ring 214 is fixedly connected to the upper end of the moving column 213, and the fixing ring 214 and the third limiting groove 211 are slidably matched with each other, and the housing 27 is aligned with the locking pin 24 and inserted, and at this time, the locking pin 24 lifts up the second The second steel ball 220 is blocked by the outer shell 27 and cannot move outward, thereby pushing the movable column 213 to move upward. When the second steel ball 220 moves upward to the position where it is separated from the inclined surface, the second steel ball 220 is not blocked by the outer shell 27 and moves outward, so that the locking pin 24 is inserted into the lower end of the movable column 213. Due to the lack of the push of the second steel ball 220, the movable column 213 moves downward under the push of the second spring 217, so that the second steel ball 220 is pushed inward by the inclined surface and enters the first groove 25 when moving downward, locking the locking pin 24 and squeezing it upward.

[0044] A first baffle 215 is fixedly connected in the housing 27, and a plurality of first steel balls 216 are arranged on the upper surface of the first baffle 215. An inclined groove 212 is provided on the lower surface of the button 29, and a second groove 218 is provided on the position of the moving column 213 near the first baffle 215. A second spring 217 is fixedly connected to the lower surface of the first baffle 215, and the lower end of the second spring 217 is fixedly connected to the moving column 213. A plurality of second through holes 219 are provided at the lower end of the moving column 213, and a second steel ball 216 is arranged in each of the plurality of second through holes 219. The first steel ball 216 is pushed inwardly through the inclined groove 212 by pressing the button 29 downwardly. The first steel ball 216 drives the movable column 213 to move upwardly by squeezing the second groove 218, thereby driving the second steel ball 220 to move upwardly, and the second steel ball 220 is released from the state of being fixed by the inclined surface, so that the second steel ball 220 is withdrawn from the first groove 25 and unlocked. Then, the split experiment box 1 is driven upwardly through the first handle 28 to separate the split experiment box 1.

[0045] like Figure 7 , Figure 9-11 As shown, a fixing mechanism 3 is fixedly connected to one side of the split experimental box 1, and the fixing mechanism 3 includes a fixing interface 31 fixedly connected to one side of the middle frame 15, and the end of the fixing interface 31 away from the middle frame 15 is fixedly connected to a capillary 32, and a pair of L-shaped grooves 35 are provided on the capillary 32, and a third spring 33 is fixedly connected to the end of the fixing interface 31 close to the capillary 32, and the second handle 43 is used to drive the limiting column 44 on the probe 41 to align with the L-shaped groove 35 on the capillary 32, so that the probe 41 is inserted into the fixing interface 31. At this time, the limiting column 44 pushes the fixing sleeve 34 to move, and when the limiting column 44 reaches the bottom end of the L-shaped groove 35, the second handle 43 is rotated, and when the limiting column 44 rotates to the straight groove 36, the third spring 33 pushes the fixing sleeve 34 to move, and the limiting column 44 is locked by the L-shaped groove 35 and the straight groove 36, thereby fixing the sensor 4 on the middle frame 15.

[0046] One end of the third spring 33 away from the fixed interface 31 is fixedly connected to a fixing sleeve 34, and one end of the fixing sleeve 34 away from the fixed interface 31 is provided with a pair of straight slide grooves 36. The fixed interface 31 is slidably connected with a sensor 4. The fixing sleeve 34 is pushed inward to disengage the limiting column 44 from the straight slide groove 36, and then the probe 41 is driven to rotate by the second handle 43 to withdraw the limiting column 44 from the L-shaped slide groove 35.

[0047] like Figure 4As shown, a sensor 4 is fixedly connected in the fixing mechanism 3, and the sensor 4 includes a probe 41 slidably connected in the fixing interface 31, and the end of the probe 41 away from the fixing interface 31 is fixedly connected to the second baffle 42, and the end of the second baffle 42 away from the probe 41 is fixedly connected to the second handle 43, and the end of the second handle 43 away from the second baffle 42 is fixedly connected to the data line 5, and the end of the probe 41 close to the second baffle 42 is fixedly connected to a pair of limit columns 44, and the limit columns 44 and the straight slide groove 36 slide with each other. The limit columns 44 pass through the sliding L-shaped slide groove 35, and the fixing sleeve 34 and the second handle 43 are provided with anti-slip grooves on the outside, and the sensor 4 is fixed on the split experiment box 1 through the cooperation between the limit columns 44 and the L-shaped slide groove 35 and the straight slide groove 36, so as to facilitate data collection.

[0048] The working principle of this embodiment is as follows: the rotating plate 13 is rotated so that the first through holes 14 are all located in a fixed position, and then the recharging pipe is inserted into the first through hole 14, and sand is filled into the split experiment box 1, and multiple split experiment boxes 1 are put on the recharging pipe one by one, and different sand is added into the split experiment box 1 each time a split experiment box 1 is put on.

[0049] Align the outer shell 27 with the locking pin 24 and insert it. At this time, the locking pin 24 lifts up the second steel ball 220. At this time, the second steel ball 220 is blocked by the outer shell 27 and cannot move outward, thereby pushing the movable column 213 to move upward. When the second steel ball 220 moves up to the position where it is separated from the inclined surface, the second steel ball 220 is not blocked by the outer shell 27 and moves outward, so that the locking pin 24 is inserted into the lower end of the movable column 213. Due to the lack of the push of the second steel ball 220, the movable column 213 moves downward under the push of the second spring 217, so that the second steel ball 220 is pushed inward by the inclined surface when moving downward and enters the first groove 25, locking the locking pin 24 and squeezing it upward. At this time, the locking pin 24 is pulled by the tension spring 23, so that the connection between the two split experimental boxes 1 is tighter, and internal water leakage is prevented by squeezing the sealing rubber strip 17.

[0050] Afterwards, the second handle 43 is used to drive the limiting column 44 on the probe 41 to align with the L-shaped groove 35 on the capillary 32, so that the probe 41 is inserted into the fixed interface 31. At this time, the limiting column 44 pushes the fixing sleeve 34 to move. When the limiting column 44 reaches the bottom end of the L-shaped groove 35, the second handle 43 is rotated. When the limiting column 44 rotates to the straight groove 36, the third spring 33 pushes the fixing sleeve 34 to move, and the limiting column 44 is locked by the L-shaped groove 35 and the straight groove 36, thereby fixing the sensor 4 on the middle frame 15.

[0051] Then, water is injected into the reinjection pipe, and experimental data is obtained through sensor 4.

[0052] When the sensor 4 needs to be unlocked, the fixing sleeve 34 only needs to be pushed inward to disengage the limiting column 44 from the straight slide groove 36 , and then the probe 41 is driven to rotate by the second handle 43 to withdraw the limiting column 44 from the L-shaped slide groove 35 .

[0053] When the split experiment box 1 needs to be separated, the button 29 is pressed downward, and the button 29 moves downward and pushes the first steel ball 216 inward through the inclined groove 212. The first steel ball 216 drives the movable column 213 to move upward by squeezing the second groove 218, so that the second steel ball 220 is driven to move upward, so that the second steel ball 220 is freed from the state of being fixed by the inclined surface, so that the second steel ball 220 withdraws from the first groove 25 and releases the lock. Thereafter, the split experiment box 1 is driven to move upward through the first handle 28, so that the split experiment box 1 is separated.

[0054] The above description is only a preferred embodiment of the present invention and is not intended to limit the protection scope of the present invention.

Claims

1. An experimental device for groundwater pumping and recharging, comprising a plurality of separate experimental boxes (1), characterized in that: Both ends of the split experiment box (1) are fixedly connected to locking mechanisms (2); one side of the split experiment box (1) is fixedly connected to a fixing mechanism (3); a sensor (4) is fixedly connected inside the fixing mechanism (3); one end of the sensor (4) away from the fixing mechanism (3) is fixedly connected to a data line (5); and a recharging pipe is provided inside the split experiment box (1); The split experiment box (1) comprises a bottom frame (11), a bottom plate (12) is fixedly connected inside the bottom frame (11), a rotating plate (13) is eccentrically rotatably connected inside the bottom plate (12), a first through hole (14) is eccentrically opened on the rotating plate (13), a middle frame (15) is rotatably connected to the upper surface of the bottom frame (11), an end of the middle frame (15) away from the bottom frame (11) is rotatably connected to the upper frame (16), and the recharging pipe penetrates and is slidably connected to the first through hole (14); The locking mechanism (2) comprises a second fixing frame (26) fixedly connected to both sides of the bottom frame (11); the first fixing frame (21) is fixedly connected to both sides of the upper frame (16); a sliding rod (22) is fixedly connected to the upper surface of the first fixing frame (21); a locking pin (24) is slidably connected to the outside of the sliding rod (22); a tension spring (23) is provided on the outer sleeve of the sliding rod (22); the upper end of the tension spring (23) is fixedly connected to the locking pin (24); and a first groove (25) is provided on the outside of the locking pin (24); The second fixing frame (26) is fixedly connected to a housing (27), the upper end of the housing (27) is penetrated by a button (29) for sliding connection, the upper top wall of the button (29) is fixedly connected to a first spring (210), the lower end of the first spring (210) is fixedly connected to a moving column (213), the lower end of the moving column (213) is provided with a plurality of second through holes (219), and a second steel ball (220) is arranged in each of the plurality of second through holes (219).

2. The experimental device for groundwater pumping and recharging according to claim 1, characterized in that: The upper and lower ends of the middle frame (15) are both fixedly connected with a first limiting ring (18); the upper surface of the bottom frame (11) and the lower surface of the upper frame (16) are both provided with a first limiting groove (19); the first limiting ring (18) and the first limiting groove (19) are slidably matched with each other; the upper surface of the upper frame (16) is fixedly connected with a sealing rubber strip (17); the outside of the rotating plate (13) is fixedly connected with a second limiting ring (110); the inside of the bottom plate (12) is provided with a second limiting groove (111); the second limiting ring (110) and the second limiting groove (111) are slidably matched with each other; and water leakage holes are provided on the bottom plate (12) and the rotating plate (13).

3. The experimental device for groundwater pumping and recharging according to claim 1, characterized in that: A first handle (28) is fixedly connected to the outside of the housing (27), a third limiting groove (211) is provided in the button (29), a fixing ring (214) is fixedly connected to the upper end of the movable column (213), and the fixing ring (214) and the third limiting groove (211) are slidably matched with each other.

4. The experimental device for groundwater pumping and recharging according to claim 3, characterized in that: A first baffle (215) is fixedly connected inside the housing (27); a plurality of first steel balls (216) are arranged on the upper surface of the first baffle (215); an inclined groove (212) is provided on the lower surface of the button (29); a second groove (218) is provided on the movable column (213) at a position close to the first baffle (215); a second spring (217) is fixedly connected to the lower surface of the first baffle (215); and a lower end of the second spring (217) is fixedly connected to the movable column (213).

5. The experimental device for groundwater pumping and recharging according to claim 1, characterized in that: The fixing mechanism (3) comprises a fixing interface (31) fixedly connected to one side of the middle frame (15); an end of the fixing interface (31) away from the middle frame (15) is fixedly connected to a thin tube (32); a pair of L-shaped sliding grooves (35) are provided on the thin tube (32); and an end of the fixing interface (31) close to the thin tube (32) is fixedly connected to a third spring (33).

6. The experimental device for groundwater pumping and recharging according to claim 5, characterized in that: One end of the third spring (33) away from the fixed interface (31) is fixedly connected to a fixed sleeve (34), one end of the fixed sleeve (34) away from the fixed interface (31) is provided with a pair of straight sliding grooves (36), and a sensor (4) is slidably connected to the fixed interface (31).

7. The experimental device for groundwater pumping and recharging according to claim 6, characterized in that: The sensor (4) comprises a probe (41) slidably connected in the fixed interface (31); an end of the probe (41) away from the fixed interface (31) is fixedly connected to a second baffle (42); an end of the second baffle (42) away from the probe (41) is fixedly connected to a second handle (43); an end of the second handle (43) away from the second baffle (42) is fixedly connected to a data line (5); an end of the probe (41) close to the second baffle (42) is fixedly connected to a pair of limit posts (44); the limit posts (44) and the straight slide groove (36) are slidably matched with each other; the limit posts (44) penetrate the slidably connected L-shaped slide groove (35); and the fixing sleeve (34) and the second handle (43) are both provided with anti-slip patterns on the outside.

Images